An Eccentric Shear-Lag Model and Implications on the Strength of Fibrous composites

Abstract

The stress field in the vicinity of a broken fiber-reinforced composite is analyzed by means of a shear-lag model. The broken filament is positioned eccentrically relative to its neighboring fibers to simulate the commonplace non-uniformity of fiber spacing within the transverse plane. It is shown that a fiber break gives rise to severe bending, in addition to tension, in the neighboring fiber - with a substantial overstress focused on the nearest unbroken filament. The complex nature of the stress field, which is caused by the failure of a fiber within the composite casts doubt on the applicability of failure statistics derived from tensile failure data of single fibers to predict the strength of composites. (TTL)

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Document Details

Document Type
Technical Report
Publication Date
Nov 19, 1990
Accession Number
ADA229733

Entities

People

  • Y. Weitsman

Organizations

  • University of Tennessee

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Composite Materials
  • Data Science
  • Eccentricity
  • Epoxy Composites
  • Equations
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Filaments
  • Graphitic Materials
  • Information Science
  • Materials
  • Mechanics
  • Monte Carlo Method
  • Statistical Analysis
  • Statistical Data
  • Statistics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Reinforced Composite Materials
  • Theoretical Analysis.

Technology Areas

  • Space